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(11)

EP 3 942 579 A1

(12)

(43) Date of publication: 26.01.2022 Bulletin 2022/04 (21) Application number: 20713578.1 (22) Date of filing: 20.03.2020

(51) International Patent Classification (IPC):  H01F 6/04(2006.01) G01R 33/38(2006.01) F25D 19/00(2006.01) H01L 39/16(2006.01) (52) Cooperative Patent Classification (CPC): F25D 19/006; G01R 33/3804; F25B 9/10; H01F 6/04; F25D 19/00; H01L 39/16; G01R 33/3815 (86) International application number: PCT/EP2020/057804 (87) International publication number: WO 2020/193415 (01.10.2020 Gazette 2020/40)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 22.03.2019 US 201962822100 P (71) Applicant: Koninklijke Philips N.V. 5656 AG Eindhoven (NL)	(72) Inventors: VAN LANEN, Ezra, Petrus, Antonius 5656 AE Eindhoven (NL) MENTEUR, Philippe, Abel 5656 AE Eindhoven (NL) URBAHN, John, Arthur 5656 AE Eindhoven (NL) (74) Representative: Philips Intellectual Property & Standards  High Tech Campus 52 5656 AG Eindhoven 5656 AG Eindhoven (NL)